an operating system I'm working on based on the "Write Your Own Operating System" series on YouTube. here is the wyoos repo.
this is not encredibly polished at all
It's interesting playing around with really low level stuff on i386 and seeing the stuff that's just really weird because of backwards compatibility. I kinda want to rewrite the interrupt thing in a way that might be cleaner, but for now I'm following the series to just try to get interrupts working. so far its getting interrupts for the hardware timer but I'm trying to get keyboard ones too.
I also got text to wrap and scroll automatically for what that's worth.
- g++
- 32 bit compilation libs (for g++ -m32)
- qemu (you can use some other vm thing but i used this one)
- xorriso (there's a way to give qemu bzimages but i haven't bothered)
- IMPORTANT if you don't have xorriso grub-mkrescue might silently fail :-/ install xorriso to avoid confusion
- grub-mkrescue
- gdb
the debugging thing is cool but it took me a while to setup i had to play around and guess where to add-symbols-file mykernel.bin to get things to line up. qemu will allow you to treat your kernel kinda like a normal program using remote gdb stuff. see gdbscript
also it doesn't mater if you use qemu-system-i386 or qemu-system-x86_64, but if your
qemu package is like the Ubuntu 18.04 one and you try to run $ qemu you will see
that there is no binary for some reason and you need to pick from qemu-* or qemu-system-*